<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>css01</title>
    <style>
        h1 {
            font-size: 100px;
            color: darkgreen;
        }
    </style>
</head>
<body>
<h1>
    今天开始变漂亮
</h1>

</body>
</html>